Jarrid That person was me. I bought a driver dog from Moss for the Lucas distributor. The dog is too tall and needs to be ground down to 3/8". (Grind the bottom and not the top, leaving the two tangs protruding up.) You then need to notch the bottom of the driver dog to replace the notches you just ground off while reducing the height of the dog. I simply used a hack saw. Make sure that you put the notches off center, similar to the tangs on the top of the dog. I then took a bolt, I can't remember what size, cut the threaded portion off and welded the unthreaded portion to the driver dog on the inside of the dog. The bolt can be quite long as the shaft coming out of the engine block is hollow and pretty deep. You need to place the weld low in the dog so that the male end of the dog that is on the distributor will fit inside. I then cut off the head of the bolt and pressed the newly made spacer onto my distributor. The fit was very tight, and with the long male end on the spacer protruding down into the shaft coming out of the engine block, I figure that I didn't need to pin or weld the spacer to the distributor. A few thousand miles later, everything seems OK.
A friend of mine (Keith, are you reading this) managed to rework the oil pump from an early Series car using parts of a later series car, so that he didn't have to build a spacer. Unfortunately, his method requires removing the engine to get at the oil pump, but if your motor is out, the conversion can be done.
Bill Lewis